DrapehausDrapehaus
Preparing the room
Drapehaus
Preparing the room
Free tool
How many metres your curtains actually need — including the fabric lost to pattern matching, which is the part most calculators quietly ignore.
Measure the track, not the window.
Top of the heading to where the hem should sit.
The fullest and most forgiving. Works on almost any track or pole.
0 for a plain fabric.
Fabric needed
10.1m
An estimate for planning. We measure before anything is cut.
FAQ
Multiply the track width by the fullness for your heading — 2.5x for pencil pleat, 2.25x for pinch pleat, 2.2x for eyelet or wave. Divide by the usable fabric width to get the number of widths, then multiply by the cut length, which is the finished drop plus hem and heading allowances.
The track or pole, always. The track normally extends past the window on both sides so the curtains can stack clear of the glass when open. Measuring the window underestimates the fabric.
Fullness is how much more fabric goes into the curtain than the width it covers. At 2.5x, a 200cm track takes 500cm of gathered fabric. Less fullness means a flatter, cheaper curtain that never looks quite right. It is the first thing people cut and the first thing they regret.
Every width has to start at the same point in the pattern so the design matches across the join. That means each cut length rounds up to a whole number of repeats. A 64cm repeat on a 250cm cut can add most of a metre per width.
It is accurate for planning and budgeting. Do not cut from it. Real windows are rarely square, floors are rarely level, and the heading allowance changes with the tape or pleat being used. We measure on site before anything is cut.